Yellow wool-dye of the anthraquinone series.



wires, snares PATENT Enron.

PAUL rnomson nwsm, or woman-n11, NEAR nnnnnrntn, QERMANY} assxenon TO FABBENFABRIKE'N enn. FRIEDR. BAYER ,& oil, or ELBERTELD, GERMANY, A

coaroaarxon or Gem/zany.

YELLOW WOOL-DYE or me Aarnaaaemem snares.

No Drawing.

Sp ecifieation of Lettrsfatent; Application filed December 6, Lili. Serial 1101735307.

- Patented oceanieie.

To all whom it may concern:

Be it kown that 11, PAUL THOMA- sonnwsm, octor of philosophy, chemist,

citizen of the German Empire, residing at Voliwinkel,- near Elberfeld, Germany, have invented new useful Improvements in;

Yellow 'Wool-Dye of the Anthraquin'one Se ries, of which the following is a specifi- (obtained according to British Letters Patent No. 11931/09) with. aliphatic beta-diketones containing the radical CH -GO CH CO, such as aceto-acetic acid ethyl ester, and more specifically *with amids of such aliphatic beta-diketones as contain the radical OH CO-CH CONH such as aceto-acetic acid amid, aceto-acetic acid anilid, etc.

The new dyes are after being dried and pulverized in the shape of their alkaline salts yellow powders soluble in water with a yellow coloration,

In order to illustrate the new process more fully the following example is given, the parts being by weight:-l0 arts of the sodium salt of the 4-am1no-1-anthraisothiazolew8-sulfonic acid (see British Letters Patent No. 11931/09) are dissolved in 200.

I parts of concentrated sulfuric acid and diazotized with 3 parts of sodium nitrite. The diazo compound thus obtained is precipitated by diluting the solution with ice water, it is filtered off and is stirred into 500 parts of Water containing 6 parts of acetoacetic acid anilid wi h the addition of sodium acetate or soda until it shows a slightly alkaline reaction antithe formation o m dyestufi is t mp B the, addition of Canaan salt it isprec'i pitategl and filtered oil. The dyestufi having as ree acid most probably the formula:

is after being dried and pulverized inthe sha eof its sodium salt a yellow powder soluble in water with a yellow coloration. It dyes Wool from an acid bath in brilliant yellow shades fast to light.

By replacing the aceto-acetic acid anilid by 3.5 parts of the amid or by 4 parts of the ester or by 6.5 parts of ort-ho-chloroanilid of the aceto-acetic acid also yellow dyestuffs are obtained distinguished by. a

good fastness to chromium compounds and to milling. By replacing the alpha-aminothiazolesulfonic acid by the beta compounds greenish-yellow dyestuffs are obtainedf I claim 1. The new dyestuffs being combinations of diazotized amino-anthraisothiazole-suL fonic acids containing the radical:

coloration; dyein wool from acid baths fast yellow sliades, su stantially' as described,

2. The new dyestuffs being combinations of diazotized amino-antln'alsothiazole-sultonic acid containing the radical and amids of the structure CH -CO CH -CONHR, where R is an aromatic radical, which dyestufi's are after being dried shades 'fast to and pulverized in the shape of their alkaline salts yellow powders soluble in water with a yellow coloration; dyeing wool from acid baths fast yellow shades; substantially as described.

4. The new dyestufi' having as free acid most probably the formula:

H I o- -o oo-Nu-oan rr-on which is after being dried and pulverized in soluble in water with a yellow coloration; and dyeing wool from an acid bath yellow light, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. v

PAUL THOMASCHEWSKI. [1. 5.] Witnesses:

ALBERT NUFER, HELEN NUFER.

the shape of its sodium salt a yellow powder 

